Study of respiratory symptoms among sputum positive

or I
than 20-30. More than 20 cases have been repeated and in one case, this
cutaneous manifestation was the only sign of inadequate antituberculous
therapy (Rietbroek et aI., 1991).
Chest radiographs:
The chest radiograph IS the single most important means for
detecting miliary tuberculosis. The classic pattern of diffuse, bilateral,
symmetrical, discrete, pinpoint 2 to 3 mm densities. Some ofthe apparent
variations in the size ofthe lesions are due to densities in various depths of
the lung parenchyma superimposed on the chest film. At first the tiny
nodules may have faint, hazy outlines, but they sharpen as they grow
larger. Often they appear more numerous at the central and basal areas of
the film because of the greater thickness of the lung at these sites
(Divinagracia and Harris, 1999).
Classification of tuberculosis:
Information derived from the history, physical examination, PPD
-... _I tuberculin skin test result, chest radiograph, and microbiological studies is
4-1 I
used to classify TB case. Classification scheme used by the American
Thoracic society and CDC is provided as (Gochuico and Bernardo,
1997):
Class 0
Class I
Class 2
Class 3
No exposure; no infection
exposure; no infection
Infection, no disease (i.e, +ve PPD reaction but no evidence of
active TB)
Disease, clinically active
42